files?: string[],

      private _attachFileEntry?: (fileEntry: FileEntry) => void,

      private _detachFileEntry?: (fileEntry: FileEntry) => void) {

      if (files) {

        for (var i = 0; i < files.length; i++) {

          this.file(files[i]);

        }

      }

    }

​

    /** Get or create file entry for a path. Creating FileEntry doesn't affect actual stored files, that is managed elsewhere. */

    file(path: string): FileEntry {

​

      var entry = this._fileByPath[path];

      if (entry) return entry;

​

      var pathParts: string[] = normalizePath(path);

      if (!pathParts.length) return null;

​

      var folder: FolderEntry;

      for (var i = 0; i < pathParts.length - 1; i++) {

        folder = this._addOrGetFolderEntry(pathParts[i], folder);

      }

​

      entry = this._addFileEntry(pathParts[pathParts.length - 1], folder);

​

      this._fileByPath[entry.path] = entry;

​

      return entry;

    }

​

    private _addOrGetFolderEntry(name: string, parent: FolderEntry) {

      var folders = parent ? parent.folders : this.folders;

      var result = find(

        folders(),

        (f, index) => {

          if (f.name < name) return;

          if (f.name === name) return f;

          var result = this._createFolderEntry(parent, name);

          folders.splice(index, 0, result);

          return result;

        });

      if (!result) {

        result = this._createFolderEntry(parent, name);

        folders.push(result);

      }

      return result;

    }

​

    private _addFileEntry(name: string, parent: FolderEntry) {

      var siblings = parent ? parent.files : this.files;

      var result = find(

        siblings(),

        (f, index) => {

          if (f.name < name) return;

          if (f.name === name) return f;

          var result = this._createChildFileEntry(parent, name);

          siblings.splice(index, 0, result);

          return result;

        });

​

      if (!result) {

        result = this._createChildFileEntry(parent, name);

        siblings.push(result);

      }

​

      return result;

    }

​

    private _createFolderEntry(parent: FolderEntry, name: string) {

      var f = new FolderEntry(parent, name);

      return f;

    }

​

    private _createChildFileEntry(parent: FolderEntry, name: string) {

      var f = new FileEntry(parent, name);

      this._attachFileEntry(f);

      return f;

    }

​

  }

​

}